-LRB- CNN -RRB- -- So very many places to go , yet so little time to pore over the options .

It 's summer vacation planning season and travel recommendation site Gogobot 's users have whittled down the long list of possibilities by homing in on their favorites . On Tuesday , Gogobot released its top picks in two categories -- best natural wonders and best guided tours -- based on survey responses and nominations from its community of 2.5 million registered users , as well as reviews posted in the last 12 months for each destination or tour .

The best-of lists are part of Gogobot 's annual Travelers ' Favorite Awards .

`` We really want to pique people 's curiosity and help them discover places they might not have thought about or might not have heard of that they 'd find really fun , '' said Travis Katz , Gogobot CEO and co-founder .

In the guided tours category , those ideas include the Seattle Underground Tour , which takes visitors through parts of Seattle buildings that were largely built over after the Great Fire of 1889 .

The top pick in the natural wonders category is far more visible , especially from the beaches of Waikiki : Diamond Head State Monument in Honolulu tops the list , followed by the Grand Canyon , Northern California 's Muir Woods and other awe-inspiring natural sites in the United States and beyond .

Check out the gallery above for the top 10 wonders and see the top guided tour recommendations here .

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Gogobot travel recommendation site releases its list of top natural wonders

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Waterfalls , canyons and mountains make the list

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The site also asked users to nominate and vote on their favorite guided tours